Data table recording hot spot temperature, thermostat movement, and choke movement over time.
| Identifier | ExFiles\Box 123\1\ scan0039 | |
| Date | 6th March 1940 | |
| -2- Rm {William Robotham - Chief Engineer} /Wym. {G. Harold Whyman - Experimental Manager} 7/MH. {M. Huckerby} 6.3.40. TIME. | HOT SPOT METAL TEMP. | THERMOSTAT MOVEMENT IN ° | CHOKE MOVEMENT IN ° ---|---|---|--- ½ Min. | 11¼°C | 17½° | 27° 1 " | 11½°C | 18° | 28° 1½ " | 11¾°C | 19° | 29° 2 " | 12 °C | 20° | 30° 2½ " | 13½°C | 21° | 31° 3 " | 15 °C | 22° | 32° 3½ " | 17½°C | 23° | 33° 4 " | 19½°C | 24° | 34° 4½ " | 22 °C | 25½° | 36° 5 " | 24 °C | 27½° | 39° 5½ " | 26 °C | 30° | 42° 6 " | 28½°C | 33° | 45½° 6½ " | 31 °C | 36° | 49° 7 " | 33 °C | 39° | 52½° 7½ " | 35 °C | 42° | 56° 8 " | 36½°C | 45° | 59½° 8½ " | 38 °C | 48° | 63° 9 " | 39½°C | 51° | 66° 9½ " | 41 °C | 54° | 69° 10 " | 42 °C | 57½° | 72° FULLY OPEN. | ||
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).